They ignore the meaning of key concepts, don't know any history and usually participate in populist movements where the leaders barefacedly lie and create their own truths, ignoring completely all documented history and all studies about politics and how politics works.

sources:

Empirical observation of reactionary movements from the outside and from the inside, comparing with the knowledge I obtain by talking to other people and reading books on politics, history and economy, right-wing or left-wing.